<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
</head>
<body>
<%
String user=request.getParameter("username");

if(user!=null){
	session.setAttribute("sessionuser " ,user);
   application.setAttribute("applicationuser" , user);
   pageContext.setAttribute("pageuser", user);
}

%>
This is user name :<%=user %>
<br>
This is session name :<%=session.getAttribute("sessionuser") %>
<br>
This is application name :<%=application.getAttribute("applicationuser") %>
<br>
This is page context name :<%=pageContext.getAttribute("pageuser") %>

</body>
</html>